Question

Ваня ежедневно получает от мамы 50р. а тратит 42р. Через сколька дней он сумеет накопить деньги на покупку нового диска с любимым фильмом, если диск стоит 120р.

Answer 1

1) 50 - 42 = 8 (накопление за день)
2) 120/8 = 15
Ответ: за 15 дней Ваня сможет накопить на диск

Answer 2

50-42 = 8 р/д. 120/8 = 15 дней

Answer 3

Problem Analysis

Vanya receives 50 rubles daily from his mother and spends 42 rubles daily. We need to determine how many days it will take for him to save enough money to buy a new disc that costs 120 rubles.

Solution

To find out how many days it will take for Vanya to save enough money, we can calculate the difference between his daily income and expenses and divide it by the cost of the disc.

Let's calculate the daily savings: - Daily income: 50 rubles - Daily expenses: 42 rubles - Daily savings: 50 rubles - 42 rubles = 8 rubles

Now, let's calculate the number of days it will take for Vanya to save enough money for the disc: - Cost of the disc: 120 rubles - Number of days: 120 rubles / 8 rubles = 15 days

Therefore, it will take Vanya 15 days to save enough money to buy the new disc.

Answer

Vanya will be able to save enough money to buy the new disc with his favorite movie in 15 days.